# How to add Arrhenius Reaction Rate to energy equation?

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 January 3, 2017, 14:10 How to add Arrhenius Reaction Rate to energy equation? #1 New Member   Join Date: Sep 2012 Posts: 23 Rep Power: 13 Hi All I want to modify the below EEqn.H in order to add Arrhenius Reaction Rate to it. I am wondering whether I need to call it or add its equation separately to the file? Current EEqn: Code: ```{ volScalarField& he = thermo.he(); fvScalarMatrix EEqn ( fvm::ddt(rho, he) + mvConvection->fvmDiv(phi, he) + fvc::ddt(rho, K) + fvc::div(phi, K) + ( he.name() == "e" ? fvc::div ( fvc::absolute(phi/fvc::interpolate(rho), U), p, "div(phiv,p)" ) : -dpdt ) - fvm::laplacian(turbulence->alphaEff(), he) // - fvm::laplacian(turbulence->muEff(), he) // unit lewis no. == reaction->Sh() + fvOptions(rho, he) ); EEqn.relax(); fvOptions.constrain(EEqn); EEqn.solve(); fvOptions.correct(he); thermo.correct(); Info<< "min/max(T) = " << min(T).value() << ", " << max(T).value() << endl; }``` My energy equation should be like this: Code: ``` ∂(ρE)/∂t + ∂[u(ρE + p)]/∂x + ∂[v(ρE + p)]/∂y = ∂(uσxx + vσxy − qx)/∂x + ∂(vσyy + uσyx − qy)/∂y + qω``` where: ω == Arrhenius Reaction Rate

 January 3, 2017, 14:14 #2 New Member   Join Date: Sep 2012 Posts: 23 Rep Power: 13 Arrhenius Reaction Rate is available at : src/thermophysicalModels/specie/reaction/reactionRate/ArrheniusReactionRate/ khaledhmz likes this.

 March 23, 2022, 07:34 #3 New Member   shengnan li Join Date: Oct 2021 Posts: 6 Rep Power: 4 Excuse me, have you added it successfully? I have also encountered the same problem. Could you please share it （leeseungnan@163.com）